That's how the seven-foot-long deep-sea squid, Taningia danae, takes its prey, reports the BBC.
And, here's the Valentine's Day angle:
…further investigation revealed the light bursts may also serve another, quite different, purpose away from the hunting field - courtship. As the squid drifted around torches that had been attached to the bait rig, they emanated long and short pulses of light. The team believe the torch lights may have resembled another glowing T. danae, and the squid were possibly emitting light as courtship behaviour.
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